1
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Khalaf JK, Bess LS, Walsh LM, Ward JM, Johnson CL, Livesay MT, Jackson KJ, Evans JT, Ryter KT, Bazin-Lee HG. Diamino Allose Phosphates: Novel, Potent, and Highly Stable Toll-like Receptor 4 Agonists. J Med Chem 2023; 66:13900-13917. [PMID: 37847244 DOI: 10.1021/acs.jmedchem.3c00724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Most known synthetic toll-like receptor 4 (TLR4) agonists are carbohydrate-based lipid-A mimetics containing several fatty acyl chains, including a labile 3-O-acyl chain linked to the C-3 position of the non-reducing sugar known to undergo cleavage impacting stability and resulting in loss of activity. To overcome this inherent instability, we rationally designed a new class of chemically more stable synthetic TLR4 ligands that elicit robust innate and adaptive immune responses. This new class utilized a diamino allose phosphate (DAP) scaffold containing a nonhydrolyzable 3-amide bond instead of the classical 3-ester. Accordingly, the DAPs have significantly improved thermostability in aqueous formulations and potency relative to other known natural and synthetic TLR4 ligands. Furthermore, the DAP analogues function as potent vaccine adjuvants to enhance influenza-specific antibodies in mice and provide protection against lethal influenza virus challenges. This novel set of TLR4 ligands show promise as next-generation vaccine adjuvants and stand-alone immunomodulators.
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Affiliation(s)
- Juhienah K Khalaf
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Laura S Bess
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Lois M Walsh
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Janine M Ward
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Craig L Johnson
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Mark T Livesay
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Konner J Jackson
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Jay T Evans
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Kendal T Ryter
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
| | - Hélène G Bazin-Lee
- Inimmune Corporation, 1121 E Broadway, Suite 121, Missoula, Montana 59802, United States
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2
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Pirrone MG, Ande C, Haldimann K, Hobbie SN, Vasella A, Böttger EC, Crich D. Importance of Co-operative Hydrogen Bonding in the Apramycin-Ribosomal Decoding A-Site Interaction. ChemMedChem 2023; 18:e202200486. [PMID: 36198651 PMCID: PMC10092258 DOI: 10.1002/cmdc.202200486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/05/2022] [Indexed: 01/24/2023]
Abstract
An intramolecular hydrogen bond between the protonated equatorial 7'-methylamino group of apramycin and the vicinal axial 6'-hydroxy group acidifies the 6'-hydroxy group leading to a strong hydrogen bond to A1408 in the ribosomal drug binding pocket in the decoding A site of the small ribosomal subunit. In 6'-epiapramycin, the trans-nature of the 6'-hydroxy group and the 7'-methylamino group results in a much weaker intramolecular hydrogen bond, and a consequently weaker cooperative hydrogen bonding network with A1408, resulting overall in reduced inhibition of protein synthesis and antibacterial activity.
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Affiliation(s)
- Michael G Pirrone
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, 30602, Athens, GA, USA
| | - Chennaiah Ande
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, 30602, Athens, GA, USA
| | - Klara Haldimann
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 28, 8006, Zürich, Switzerland
| | - Sven N Hobbie
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 28, 8006, Zürich, Switzerland
| | - Andrea Vasella
- Organic Chemistry Institute, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
| | - Erik C Böttger
- Institute of Medical Microbiology, University of Zurich, Gloriastrasse 28, 8006, Zürich, Switzerland
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences, Department of Chemistry, Complex Carbohydrate Research Center, University of Georgia, 250 West Green Street, 30602, Athens, GA, USA
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3
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Romanò C, Clausen MH. Chemical Biology of αGalCer: a Chemist’s Toolbox for the Stimulation of Invariant Natural Killer T (iNKT) Cells. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cecilia Romanò
- Technical University of Denmark: Danmarks Tekniske Universitet Department of Chemisty Kemitorvet 207 2800 Kgs. Lyngby DENMARK
| | - Mads Hartvig Clausen
- Technical University of Denmark Department of Chemistry Kemitorvet, Building 201 2800 Kgs. Lyngby DENMARK
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4
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Cristófalo AE, Cano ME, Uhrig ML. Synthesis of Thiodisaccharides Bearing N-Acetylhexosamine Residues: Challenges, Achievements and Perspectives. CHEM REC 2021; 21:2808-2836. [PMID: 34170606 DOI: 10.1002/tcr.202100146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 01/06/2023]
Abstract
Carbohydrate-protein interactions are involved in a myriad of biological processes. Thus, glycomimetics have arisen as one of the most promising synthetic targets to that end. Within the broad variety of glycomimetics, thiodisaccharides have proven to be excellent tools to study these processes, and even more, some of them unveiled interesting biological activities. This review brings together research made on the introduction of N-acetylhexosamine residues into thiodisaccharides to date, passing through classic substitution (as SN 2, thioglycosylation and ring-opening reactions) and addition (as thiol-ene coupling and Michael-type additions) reactions. Recent and interesting developments regarding addition reactions to vinyl azides, cross-coupling reactions and novel chemoenzymatic methods are also discussed.
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Affiliation(s)
- Alejandro E Cristófalo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - María Emilia Cano
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - María Laura Uhrig
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales., Departamento de Química Orgánica, Intendente Güiraldes, 2160 (C1428EHA), Buenos Aires, Argentina.,CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
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5
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Imperio D, Morelli L, Compostella F, Panza L. An Efficient and Concise Synthesis of α-Galactosylceramide. Synlett 2021. [DOI: 10.1055/a-1293-9578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractA concise and stereoselective synthesis of α-galactosylceramide (α-GalCer) is described. The key features of the synthetic strategy are the use of a phytosphingosine in which the amine is masked as a tetrachlorophthalimide and the diol as an isopropylidene acetal, and the galactosyl donor is protected as a 4,6-benzylidene to improve the α selectivity of the glycosylation reaction. The pattern of protecting groups on the donor and the acceptor have proven to give an excellent match of reactivity, allowing the glycosylation reaction to take place stereoselectively. The overall synthesis gave α-GalCer in good yields and in few steps.
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Affiliation(s)
- Daniela Imperio
- Dipartimento di Scienze del Farmaco, Università degli Studi del Piemonte Orientale
| | - Laura Morelli
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano
| | - Federica Compostella
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano
| | - Luigi Panza
- Dipartimento di Scienze del Farmaco, Università degli Studi del Piemonte Orientale
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6
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Cristófalo AE, Uhrig ML. Synthetic Studies on the Incorporation of N-Acetylallosamine in Hyaluronic Acid-Inspired Thiodisaccharides. Molecules 2021; 26:E180. [PMID: 33401465 PMCID: PMC7796257 DOI: 10.3390/molecules26010180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 12/16/2022] Open
Abstract
Two approaches for the synthesis of the thiodisaccharide β-S-GlcA(1→3)β-S-AllNAc are described here. The target disaccharide was a C-3 epimer and thio-analogue of the hyaluronic acid repetitive unit, tuned with a thiopropargyl anomeric group for further click conjugation. Thus, we analysed and tested two convenient sequences, combining the two key steps required to introduce the thioglycosidic bonds and consequently reach the target molecule: the SN2 substitution of a good leaving group (triflate) present at C-3 of a GlcNAc derivative and the introduction of the anomeric thiopropargyl substituent. The use of a 2-azido precursor showed to be a convenient substrate for the SN2 step. Nevertheless, further protecting group manipulation and the introduction of the thiopropargyl anomeric residue were then required. This approach showed to provide access to a variety of thiodisaccharide derivatives as interesting building blocks for the construction of neoglycoconjugates.
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Affiliation(s)
- Alejandro E. Cristófalo
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Buenos Aires C1428EGA, Argentina;
- Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), CONICET-Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
| | - María Laura Uhrig
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Buenos Aires C1428EGA, Argentina;
- Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), CONICET-Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
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7
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Cristófalo AE, Cagnoni AJ, Uhrig ML. Synthesis of N-acetylglucosamine and N-acetylallosamine resorcinarene-based multivalent β-thio-glycoclusters: unexpected affinity of N-acetylallosamine ligands towards Wheat Germ Agglutinin. Org Biomol Chem 2020; 18:6853-6865. [PMID: 32856676 DOI: 10.1039/d0ob01498b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Herein, we report the synthesis of calix[4]resorcinarene-based multivalent ligands bearing β-S-GlcNAc and β-S-AllNAc recognition elements. A clickable β-S-AllNAc derivative was successfully prepared from a β-thioalkynyl GlcNAc precursor, making use of a 2,3-oxazoline intermediate, easily formed by intramolecular displacement of a triflate group located at the 3-position by the 2-N-acetate group. By reaction of these alkynyl-functionalized derivatives with an octaazido-calix[4]resorcinarene macrocycle having undecyl chains, two octavalent glycoclusters exposing the epimeric N-acetylhexosamines were obtained. In addition, a related calix[4]resorcinarene-based glycocluster having methyl groups instead of undecyl chains and β-S-GlcNAc residues was also synthesized. After an initial evaluation of the interaction of the undecyl-functionalized β-S-GlcNAc octavalent derivative with Wheat Germ Agglutinin (WGA) by a turbidimetry experiment, the interaction of the three synthesized glycoclusters towards WGA was studied by Isothermal Titration Calorimetry. The results showed a favorable effect due to the presence of the undecyl chains in terms of affinity. Surprisingly, the β-S-AllNAc octavalent compound showed the highest affinity among the evaluated glycoclusters, showing for the first time that WGA interacts with β-AllNAc-bearing ligands. Molecular docking studies of β-AllNAc with WGA in comparison with β-GlcNAc contributed to the understanding of the atomic interactions responsible for this unexpected affinity.
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Affiliation(s)
- Alejandro E Cristófalo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Intendente Güiraldes 2160 (C1428EHA), Buenos Aires, Argentina.
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8
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Cristófalo AE, Nieto PM, Uhrig ML. Synthesis of (1→3) Thiodisaccharides of GlcNAc and the Serendipitous Formation of 2,3-Dideoxy-(1→2)-thiodisaccharides through a Vinyl Azide Intermediate. J Org Chem 2019; 85:306-317. [PMID: 31802661 DOI: 10.1021/acs.joc.9b01883] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The syntheses of β-S-GlcA(1→3)GlcNAc and β-S-Gal(1→3)GlcNAc thiodisaccharides, which can be considered mimetics of the repeating units of hyaluronan and keratan respectively, were achieved by SN2 displacement of a triflate group allocated at the 3-position of a convenient 2-azido-4,6-O-benzylidene-2-deoxy-β-d-allopyranose precursor by the corresponding nucleophilic suitable protected thioaldoses derived from glucuronic acid (GlcA) and galactose (Gal). The study of the reaction led to the finding that the vinyl azide formed by competitive E2 reaction of the mentioned triflate was an interesting precursor of a new kind of 2,3-dideoxy-2-azido-(1→2) thiodisaccharides through an addition reaction. Determination of the stereochemistry of the new stereocenter at C-2 was achieved by NOESY experiments. Final protecting group manipulation of the (1→3) thiodisaccharides led to a family of derivatives that could be used as building blocks for the synthesis of complex glycomimetics.
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Affiliation(s)
- Alejandro Ezequiel Cristófalo
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires , Ciudad Universitaria , Pabellón 2, C1428EGA Buenos Aires , Argentina.,CONICET-Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) , C1428EGA Buenos Aires , Argentina
| | - Pedro M Nieto
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), cicCartuja , CSIC and Universidad de Sevilla , 41092 Sevilla , España
| | - María Laura Uhrig
- Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires , Ciudad Universitaria , Pabellón 2, C1428EGA Buenos Aires , Argentina.,CONICET-Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) , C1428EGA Buenos Aires , Argentina
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9
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Chatterjee D, Nayak S, Paul A, Yadav S. Syntheses of Orthogonally Protected
d‐
Galactosamine,
d
‐Allosamine and
d
‐Gulosamine Thioglycoside Building Blocks with
N
‐phthalimido Groups. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Debnath Chatterjee
- Department of ChemistryIndian Institute of Technology (ISM) Dhanbad 826004, Jharkhand India
| | - Sourav Nayak
- Department of ChemistryIndian Institute of Technology (ISM) Dhanbad 826004, Jharkhand India
| | - Abhijit Paul
- Department of ChemistryIndian Institute of Technology (ISM) Dhanbad 826004, Jharkhand India
| | - Somnath Yadav
- Department of ChemistryIndian Institute of Technology (ISM) Dhanbad 826004, Jharkhand India
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10
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Panza L, Compostella F, Imperio D. A versatile synthesis of αGalCer and its analogues exploiting a cyclic carbonate as phytosphingosine 3,4-diol protecting group. Carbohydr Res 2019; 472:50-57. [DOI: 10.1016/j.carres.2018.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/06/2018] [Accepted: 11/06/2018] [Indexed: 12/20/2022]
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11
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Hunter CD, Guo T, Daskhan G, Richards MR, Cairo CW. Synthetic Strategies for Modified Glycosphingolipids and Their Design as Probes. Chem Rev 2018; 118:8188-8241. [DOI: 10.1021/acs.chemrev.8b00070] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Carmanah D. Hunter
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Tianlin Guo
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Gour Daskhan
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Michele R. Richards
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Christopher W. Cairo
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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12
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Song W, Cai J, Zou X, Wang X, Hu J, Yin J. Applications of controlled inversion strategies in carbohydrate synthesis. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.09.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Zhang P, Hevey R, Ling CC. Total Synthesis of β-d-ido-Heptopyranosides Related to Capsular Polysaccharides of Campylobacter jejuni HS:4. J Org Chem 2017; 82:9662-9674. [DOI: 10.1021/acs.joc.7b01752] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pengfei Zhang
- Alberta Glycomics Centre,
Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Rachel Hevey
- Alberta Glycomics Centre,
Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Chang-Chun Ling
- Alberta Glycomics Centre,
Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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14
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Dhurandhare VM, Wen YS, Gawande SD, Liao PH, Wang CC. Synthesis of d-Galactosamine and d-Allosamine Derivatives via a Microwave-Assisted Preparation of 1,6-Anhydroglucosamine. J Org Chem 2016; 81:11521-11528. [PMID: 27775348 DOI: 10.1021/acs.joc.6b02038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a microwave-assisted intramolecular anomeric protection (iMAP) of glucosamine, which facilitates concise transformation of 1,6-anhydroglucosamine into 1,6-anhydrogalactosamine and 1,6-anhydroallosamine. The iMAP simultaneously obviates both the O1 and O6 protection, and the differentiation between O3 and O4 can be well-controlled by the N2 functionality because of the hydrogen bonding between N2 and O4. Epimerization of O4 afforded the galactosamine derivative and that of O3 yielded allosamine.
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Affiliation(s)
- Vijay M Dhurandhare
- Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.,Chemical Biology and Molecular Biophysics, Taiwan International Graduate Program (TIGP), Academia Sinica , 128, Section 2, Academia Road, Taipei 115, Taiwan.,Institute of Bioinformatics and Structural Biology, National Tsing Hua University , 101, Section 2, Kuang-Fu Road, Hsinchu 300, Taiwan
| | - Yuh-Sheng Wen
- Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan
| | | | - Pin-Hsuan Liao
- Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan
| | - Cheng-Chung Wang
- Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.,Chemical Biology and Molecular Biophysics, Taiwan International Graduate Program (TIGP), Academia Sinica , 128, Section 2, Academia Road, Taipei 115, Taiwan
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15
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Eum H, Choi J, Cho CG, Ha HJ. Regiochemistry-Directed Syntheses of Polyhydroxylated Alkaloids from Chiral Aziridines. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500285] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Heesung Eum
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
- R&SD Strategy Center; Industry-University Cooperation Foundation; Hanyang University; Ansan 426-791 Republic of Korea
| | - Jihye Choi
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
| | - Cheon-Gyu Cho
- Department of Chemistry; Hanyang University; Seoul 04763 Republic of Korea
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin, Kyunggi-Do 17035 Republic of Korea
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16
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Anderson RJ, Compton BJ, Tang CW, Authier-Hall A, Hayman CM, Swinerd GW, Kowalczyk R, Harris P, Brimble MA, Larsen DS, Gasser O, Weinkove R, Hermans IF, Painter GF. NKT cell-dependent glycolipid-peptide vaccines with potent anti-tumour activity. Chem Sci 2015; 6:5120-5127. [PMID: 28717498 PMCID: PMC5500832 DOI: 10.1039/c4sc03599b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 06/25/2015] [Indexed: 12/22/2022] Open
Abstract
Glycolipid–peptide conjugates designed to release vaccine components within target cells ensuring potent CD1d dependent T cell responses.
It is known that T cells can eliminate tumour cells through recognition of unique or aberrantly expressed antigens presented as peptide epitopes by major histocompatibility complex (MHC) molecules on the tumour cell surface. With recent advances in defining tumour-associated antigens, it should now be possible to devise therapeutic vaccines that expand specific populations of anti-tumour T cells. However there remains a need to develop simpler efficacious synthetic vaccines that possess clinical utility. We present here the synthesis and analysis of vaccines based on conjugation of MHC-binding peptide epitopes to α-galactosylceramide, a glycolipid presented by the nonpolymorphic antigen-presenting molecule CD1d to provoke the stimulatory activity of type I natural killer T (NKT) cells. The chemical design incorporates an enzymatically cleavable linker that effects controlled release of the active components in vivo. Chemical and biological analysis of different linkages with different enzymatic targets enabled selection of a synthetic vaccine construct with potent therapeutic anti-tumour activity in mice, and marked in vitro activity in human blood.
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Affiliation(s)
- Regan J Anderson
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Benjamin J Compton
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Ching-Wen Tang
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Astrid Authier-Hall
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Colin M Hayman
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Gene W Swinerd
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,School of Biological Sciences , Victoria University of Wellington , PO Box 600 , Wellington 6140 , New Zealand
| | - Renata Kowalczyk
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - Paul Harris
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - Margaret A Brimble
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - David S Larsen
- Department of Chemistry , University of Otago , PO Box 56 , Dunedin 9054 , New Zealand
| | - Olivier Gasser
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Robert Weinkove
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,Department of Pathology & Molecular Medicine , University of Otago Wellington , New Zealand
| | - Ian F Hermans
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,Maurice Wilkins Centre for Molecular Biodiscovery , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand.,School of Biological Sciences , Victoria University of Wellington , PO Box 600 , Wellington 6140 , New Zealand
| | - Gavin F Painter
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
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17
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Recent progress in the field of glycoconjugates. Carbohydr Res 2015; 402:124-32. [DOI: 10.1016/j.carres.2014.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 08/07/2014] [Accepted: 10/10/2014] [Indexed: 01/13/2023]
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18
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Hung JT, Sawant RC, Chen JC, Yen YF, Chen WS, Yu AL, Luo SY. Design and synthesis of galactose-6-OH-modified α-galactosyl ceramide analogues with Th2-biased immune responses. RSC Adv 2014. [DOI: 10.1039/c4ra08602c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, a simple type of O-6 analogue of KRN7000 was synthesized starting from galactosyl iodide and d-lyxose.
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Affiliation(s)
- Jung-Tung Hung
- Genomics Research Center
- Academia Sinica
- Taipei 115, Taiwan
- Institute of Stem Cell & Translational Cancer Research
- Chang Gung Memorial Hospital at Linkou
| | | | - Ji-Chuan Chen
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | - Yu-Fen Yen
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | - Wan-Shin Chen
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | - Alice L. Yu
- Genomics Research Center
- Academia Sinica
- Taipei 115, Taiwan
- Institute of Stem Cell & Translational Cancer Research
- Chang Gung Memorial Hospital at Linkou
| | - Shun-Yuan Luo
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
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19
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Chen WS, Sawant RC, Yang SA, Liao YJ, Liao JW, Badsara SS, Luo SY. Synthesis of ganglioside Hp-s1. RSC Adv 2014. [DOI: 10.1039/c4ra08272a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The complete synthesis of the ganglioside Hp-s1 (1) is described in 10 steps.
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Affiliation(s)
- Wan-Shin Chen
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | | | - Shih-An Yang
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | - Ying-Ju Liao
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | - Jung-Wei Liao
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
| | | | - Shun-Yuan Luo
- Department of Chemistry
- National Chung Hsing University
- Taichung 402, Taiwan
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20
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Thota VN, Brahmaiah M, Kulkarni SS. Synthesis of a C-Glycoside Analogue of β-Galactosyl Ceramide, a Potential HIV-1 Entry Inhibitor. J Org Chem 2013; 78:12082-9. [DOI: 10.1021/jo402115w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- V. Narasimharao Thota
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Mula Brahmaiah
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Suvarn S. Kulkarni
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
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21
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Oba M, Koguchi S, Nishiyama K. Stereoselective Synthesis of 3,4-Dihydroxylated Prolines and Prolinols Starting fromL-Tartaric Acid. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Oba
- Department of Materials Chemistry; Tokai University; 317 Nishino Numazu Shizuoka 410-0395 Japan
| | - S. Koguchi
- Department of Chemistry; Tokai University; 4-1-1 Kitakaname Hiratsuka Kanagawa 259-1292 Japan
| | - K. Nishiyama
- Department of Materials Chemistry; Tokai University; 317 Nishino Numazu Shizuoka 410-0395 Japan
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22
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Sawant RC, Hung JT, Chuang HL, Lin HS, Chen WS, Yu AL, Luo SY. Synthesis of Hydroxylated Analogues of α-Galactosyl Ceramide (KRN7000) with Varying Stereochemistry. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Shie CR, Tzeng ZH, Wang CC, Hung SC. Metal Trifluoromethanesulfonate-Catalyzed Regioselective Reductive Ring Opening of Benzylidene Acetals. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200900076] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Yeh CH, Pan SD, Chen SW, Fu ZW, Chiang LW, Yu CS. An Improved Synthesis of Ceramide for Constructing α-Galactosyl Ceramide Analogs. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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26
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Thota VN, Gervay-Hague J, Kulkarni SS. Synthesis of β-C-galactosyl D- and L-alanines. Org Biomol Chem 2013; 10:8132-9. [PMID: 22961309 DOI: 10.1039/c2ob26078f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of β-C-D-galactosyl D- and L-alanines is carried out via a highly stereoselective Grignard reaction of glycosyl iodides, Sharpless dihydroxylation and S(N)2 displacement of the corresponding mesylate or tosylate. Alternatively, attempted triflation of the intermediate alcohols triggers a stereoselective debenzylative cyclization leading to interesting bicyclic trans-fused compounds.
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Affiliation(s)
- V Narasimharao Thota
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
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27
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Yen YF, Kulkarni SS, Chang CW, Luo SY. Concise synthesis of α-galactosyl ceramide from d-galactosyl iodide and d-lyxose. Carbohydr Res 2013; 368:35-9. [DOI: 10.1016/j.carres.2012.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 11/12/2012] [Accepted: 11/14/2012] [Indexed: 10/27/2022]
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28
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29
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Sail D, Kováč P. Benzoylated ethyl 1-thioglycosides: direct preparation from per-O-benzoylated sugars. Carbohydr Res 2012; 357:47-52. [PMID: 22739243 PMCID: PMC3568975 DOI: 10.1016/j.carres.2012.05.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 05/14/2012] [Accepted: 05/15/2012] [Indexed: 10/28/2022]
Abstract
D-Glucose, lactose, maltose, and melibiose were benzoylated with Bz(2)O-Et(3)N reagent to give fully benzoylated β products. Under the same conditions, D-mannose produced a mixture where the β-benzoate predominated. Treatment of the foregoing compounds with EtSH at slightly elevated temperature (50-60°C) in the presence of BF(3)·Et(2)O as a promoter gave the corresponding ethyl 1-thio glycosides in high yields. The α-products predominated in all cases in the anomeric mixtures formed. Individual products of all reactions were isolated by chromatography, they were obtained in analytically pure state, and were fully characterized by (1)H and (13)C NMR data and physical constants.
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Affiliation(s)
- Deepak Sail
- NIDDK, LBC, National Institutes of Health, Bethesda, MD 20892-0815, USA
| | - Pavol Kováč
- NIDDK, LBC, National Institutes of Health, Bethesda, MD 20892-0815, USA
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30
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Structure-activity relationship studies of novel glycosphingolipids that stimulate natural killer T-cells. Biosci Biotechnol Biochem 2012; 76:1055-67. [PMID: 22790924 DOI: 10.1271/bbb.120072] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
KRN7000, an anticancer drug candidate developed by Kirin Brewery Co. in 1995, is an α-galactosyl ceramide. It is a ligand making a complex with CD1d protein, and it stimulates invariant natural killer T (NKT) cells, which are one of the lineages of immunocytes. NKT cells activated by recognition of the CD1d/KRN7000 complex with its invariant T-cell receptor (TCR) can induce both protective and regulatory immune responses. To determine the recognition and activation mechanisms of NKT cells and to develop drug candidates more effective than KRN7000, a large number of analogs of KRN7000 have been synthesized. Some of them show potent bioactivities and have the potential of being utilized as therapeutic agents. In this review, structure-activity relationship studies of novel glycolipids which stimulate NKT cells efficiently are summarized.
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31
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Hsu CH, Hung SC, Wu CY, Wong CH. Toward automated oligosaccharide synthesis. Angew Chem Int Ed Engl 2011; 50:11872-923. [PMID: 22127846 DOI: 10.1002/anie.201100125] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Indexed: 12/16/2022]
Abstract
Carbohydrates have been shown to play important roles in biological processes. The pace of development in carbohydrate research is, however, relatively slow due to the problems associated with the complexity of carbohydrate structures and the lack of general synthetic methods and tools available for the study of this class of biomolecules. Recent advances in synthesis have demonstrated that many of these problems can be circumvented. In this Review, we describe the methods developed to tackle the problems of carbohydrate-mediated biological processes, with particular focus on the issue related to the development of the automated synthesis of oligosaccharides. Further applications of carbohydrate microarrays and vaccines to human diseases are also highlighted.
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Affiliation(s)
- Che-Hsiung Hsu
- The Genomics Research Center, Academia Sinica, Taipei, Taiwan
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32
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Hsu CH, Hung SC, Wu CY, Wong CH. Auf dem Weg zur automatisierten Oligosaccharid- Synthese. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100125] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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33
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Yook CM, Eum HS, Ha HJ, Kang KY, Lee WK. Regiochemical Pathway in the Ring Opening of 2-Acylaziridines. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.2879] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Wang XL, Huang WF, Lei XS, Wei BG, Lin GQ. A facile synthesis of 1,4-dideoxy-1,4-imino-l-ribitol (LRB) and (−)-8a-epi-swainsonine from d-glutamic acid. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.075] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Chang KL, Zulueta MML, Lu XA, Zhong YQ, Hung SC. Regioselective one-pot protection of D-glucosamine. J Org Chem 2011; 75:7424-7. [PMID: 20936861 DOI: 10.1021/jo101320r] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A highly regioselective one-pot transformation of 2-azido-2-deoxy-1,3,4,6-tetra-O-trimethylsilyl-d-glucopyranose via sequential additions of various reagents was systematically studied, yielding the fully protected derivatives and the 1-, 3-, 4-, as well as 6-alcohols, respectively.
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Affiliation(s)
- Ken-Lien Chang
- Genomics Research Center, Academia Sinica, 128, Section 2, Academia Road, Taipei 115, Taiwan
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36
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Banchet-Cadeddu A, Hénon E, Dauchez M, Renault JH, Monneaux F, Haudrechy A. The stimulating adventure of KRN 7000. Org Biomol Chem 2011; 9:3080-104. [DOI: 10.1039/c0ob00975j] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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37
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Stocker BL, Dangerfield EM, Win‐Mason AL, Haslett GW, Timmer MSM. Recent Developments in the Synthesis of Pyrrolidine‐Containing Iminosugars. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901320] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bridget L. Stocker
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
| | - Emma M. Dangerfield
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Anna L. Win‐Mason
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Gregory W. Haslett
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington, New Zealand
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, P. O. Box 600, Wellington, New Zealand, Fax: +64‐4‐463‐5241
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38
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Minuth T, Boysen MMK. Bis(oxazolines) based on glycopyranosides - steric, configurational and conformational influences on stereoselectivity. Beilstein J Org Chem 2010; 6:23. [PMID: 20502606 PMCID: PMC2874406 DOI: 10.3762/bjoc.6.23] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 02/18/2010] [Indexed: 11/23/2022] Open
Abstract
In previous studies we found that the asymmetric induction of bis(oxazolines) based on D-glucosamine strongly depended on the steric demand of the 3-O-substituents. To further probe the impact of the 3-position of the pyranose scaffold, we prepared 3-epimerised and 3-defunctionalised versions of these ligands as well as a 3-O-formyl derivative. Application of these new ligands in asymmetric cyclopropanation revealed strong steric and configurational effects of position 3 on asymmetric induction, further dramatic effects of the pyranose conformation were also observed.
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Affiliation(s)
- Tobias Minuth
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
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39
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Nambu H, Nakamura S, Suzuki N, Hashimoto S. Stereocontrolled Construction of 1,2-cis-α-Glycosidic Linkages Using Glycosyl Diphenyl Phosphates and Synthesis of α-Galactosylceramide KRN7000. TRENDS GLYCOSCI GLYC 2010. [DOI: 10.4052/tigg.22.26] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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40
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Cai Y, Ling CC, Bundle DR. Efficient synthesis of D-xylo and D-ribo-phytosphingosines from methyl 2-amino-2-deoxy-beta-D-hexopyranosides. Carbohydr Res 2009; 344:2120-6. [PMID: 19766990 DOI: 10.1016/j.carres.2009.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/20/2009] [Accepted: 07/21/2009] [Indexed: 11/28/2022]
Abstract
A general and flexible synthetic approach to biologically important 5,6-unsaturated C(18)-phytosphingosines was developed via olefin cross-metathesis employing truncated C(6)-phytosphingosines as the key intermediates. These were efficiently prepared in high yields by zinc-mediated reductive opening of methyl 2-amino-2-deoxy-beta-hexopyranosides. [structure: see text]
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Affiliation(s)
- Ye Cai
- Alberta Ingenuity Center for Carbohydrate Science, Department of Chemistry, University of Alberta, Edmonton, AB, Canada T6G 2G2
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41
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Zhai H, Zlotorzynska M, Sammis G. Construction of protected hydroxylated pyrrolidines using nitrogen-centered radical cyclizations. Chem Commun (Camb) 2009:5716-8. [DOI: 10.1039/b914757h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Koshiba M, Suzuki N, Arihara R, Tsuda T, Nambu H, Nakamura S, Hashimoto S. Catalytic stereoselective glycosidation with glycosyl diphenyl phosphates: rapid construction of 1,2-cis-alpha-glycosidic linkages. Chem Asian J 2008; 3:1664-77. [PMID: 18604830 DOI: 10.1002/asia.200800173] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A commercially available 0.1 M solution of HClO(4) in dioxane has been shown to catalyze the glycosidation of glycosyl diphenyl phosphates. The per-O-benzyl-protected glucosyl and galactosyl donors and the 3,4,6-tri-O-acetyl-2-azido-2-deoxygalactosyl donor each react with a range of acceptor alcohols in the presence of 0.05-0.2 equiv of HClO(4) in dioxane/Et(2)O (1:1) to afford glycosides in good yields with good to excellent alpha selectivities. The synthetic utility of this glycosidation method was demonstrated by a stereoselective synthesis of the alpha-galactosylceramide KRN7000, an activator of natural killer (NK) T cells through CD1d molecules.
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Affiliation(s)
- Miyuki Koshiba
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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43
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Dere RT, Zhu X. The First Synthesis of a Thioglycoside Analogue of the Immunostimulant KRN7000. Org Lett 2008; 10:4641-4. [DOI: 10.1021/ol8019555] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ravindra T. Dere
- Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Xiangming Zhu
- Centre for Synthesis and Chemical Biology, UCD School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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44
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Fallarini S, Paoletti T, Panza L, Lombardi G. Alpha-galactosylceramide modulates the induction of indoleamine 2,3-dioxygenase in antigen presenting cells. Biochem Pharmacol 2008; 76:738-50. [PMID: 18671950 DOI: 10.1016/j.bcp.2008.07.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 07/01/2008] [Accepted: 07/01/2008] [Indexed: 12/16/2022]
Abstract
The glycolipid alpha-galactosylceramide (alpha-GalCer), when presented on CD1 molecules by antigen presenting cells (APCs) to invariant NKT (iNKT cells), is a potent immunomodulator. Indoleamine 2,3-dioxygenase (IDO), an enzyme catalyzing the catabolism of L-tryptophan along the kynurenine pathway, is inducible in APC and represents one of the main endogenous mechanisms of T cell homeostasis, peripheral tolerance and immunosuppression. No data have been published yet on the effect of alpha-GalCer on IDO in APC. We aimed to determine if: (1) alpha-GalCer modulates IDO in APC; (2) the alpha-GalCer-induced effect on IDO correlates with the production by APC of active compounds; (3) the medium from alpha-GalCer-treated APC is able to stimulate iNKT cells. From our results alpha-GalCer alone did not modify IDO expression (RT-PCR) in APC, but when human peripheral blood mononuclear cells (PBMC), monocytes, and monocytic cell lines (THP-1), expressing high levels of CD1d, were treated with interferon-gamma (IFN-gamma) plus alpha-GalCer a significant potentiation of IDO transcription was measured. This effect was not induced by increased IFN-gamma release by APC, and it was functionally correlated with increased L-kynurenine (L-KYN) release by alpha-GalCer-treated CD1d-transfected THP-1 cells. The medium of these cells stimulated iNKT hybridoma cells to release interleukin (IL)-2, while alpha-GalCer alone resulted ineffective. The data demonstrate that alpha-GalCer: (1) does not induce IFN-gamma release by APC; (2) potentiates IFN-gamma-induced IDO expression and function in APC; (2) requires CD1d molecules for inducing these effects; (3) induces the release by APC of compounds active in stimulating iNKT cells.
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Affiliation(s)
- Silvia Fallarini
- DISCAFF Department, University of Piemonte Orientale, Via Bovio, 6, 28100 Novara, Italy
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45
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Du W, Kulkarni SS, Gervay-Hague J. Efficient, one-pot syntheses of biologically active alpha-linked glycolipids. Chem Commun (Camb) 2007:2336-8. [PMID: 17844738 DOI: 10.1039/b702551c] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Per-O-silylated galactosyl iodides undergo alpha-glycosidation with fully functionalized glycolipids producing biologically relevant conjugates.
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Affiliation(s)
- Wenjun Du
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, CA 95616, USA
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46
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Highly stereoselective Luche reduction of α-enonesulfoxides to 2-sulfinyl allylic alcohols. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Zhang J, Liang X, Wang D, Kong F. Regio- and stereoselective anomeric esterification of glucopyranose 1,2-diols and a facile preparation of 2-O-acetylated glucopyranosyl trichloroacetimidates from the corresponding 1,2-diols. Carbohydr Res 2007; 342:797-805. [PMID: 17300768 DOI: 10.1016/j.carres.2007.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2006] [Revised: 01/15/2007] [Accepted: 01/16/2007] [Indexed: 10/23/2022]
Abstract
A highly regio- and stereoselective anomeric esterification of 3-O-allyl (or benzyl, or benzoyl)-4,6-O-isopropylidene-alpha,beta-d-glucopyranose with acetyl chloride, or allyl chloroformate, or ethyl chloroformate gave the corresponding 2-OH, 1-beta-acetates or -carbonates in excellent yields. The 2-OH, 1-beta-acetates were readily converted to the corresponding 2-O-acetylated glucopyranosyl trichloroacetimidates by reaction with trichloroacetonitrile via base promoted acetyl migration, while the 2-OH, 1-beta-carbonates were good glycosyl acceptors for the synthesis of (1-->2)-linked oligosaccharides.
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Affiliation(s)
- Jianjun Zhang
- Key Lab of Pesticide Chemistry and Application Technology, Department of Applied Chemistry, China Agricultural University, Beijing 100094, China
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48
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Improved Synthesis of the Tetrasaccharide Repeat Unit of the O-Antigen Polysaccharide from Escherichia coli O77. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.2.257] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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49
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Cateni F, Zacchigna M, Zilic J, Di Luca G. Total Synthesis of a Natural Cerebroside from Euphorbiaceae. Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Murruzzu C, Riera A. Enantioselective synthesis of hydroxylated pyrrolidines via Sharpless epoxidation and olefin metathesis. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2006.12.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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